Lamp chimneys



(No Model.) Y 3 Sheets-Sheet 1.

J. LOBET.

MACHINE FOR CUTTING LAMP GHIMNEYS. No. 477,133. PatentedJune 14; 1892.

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(No Model.) 3 Sheets-Sheet 2. J. LOBET. MACHINE FOR GUTTING LAMPOHIMNBYS.

No. 477,133. Patented June 14, 1892.

Inven Zar Jan loei'.

(No Model.) Y 3 Sheets-Sheet 3.

J. LOBET. MACHINE FOB. CUTTING LAMP GHIMNBYS. No. 477,183. Patented June14, 1892.

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NITED STATES PATENT OFFICE.

JEAN LOBET, OF FLMALLE-LIEGE, BELGIUM.

MACHINE FOR CUTTING LAMP-CHIIVINEYS.

SPECIFICATION forming part of Letters Patent N 0. 477,133, dated June14, 1892.

Application filed June 26, 1891. Serial No. 397,604. (No model.)

To all whom t may concern:

Beit known that I, JEAN LOBET, a citizen of the Kingdom of Belgium,residing at Flmalle` Liege, in Belgium, have invented certain new anduseful Improvements in Machines for Cutting Lamp-Chimneys; and I dohereby declare the following to be a full, clear, and ex act descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

My invention relates to machines for cutting lamp-chimneys. The machineshitherto employed for this purpose lea-ve much to be desired as regardsrapidity of work and finish.

For cutting a lamp-chimney several operations have been necessary, notonly to cut the chimney at its two ends in order to obtain the desiredlength,but also to grind the cut chimney at its ends by means ofsuitable apparatus in order that they may be level. lVith my improvedapparatus all these difculties are obviated, for it cuts the chimneysquickly and the cuts made are so smooth and level that no subsequentoperations are needed for grinding and equalizing the divided portions.

In order that my invention may be more clearly understood7 I havedescribed the same in detail with reference to the accompanyingdrawings.

Figure l shows a general view of the machine in plan. Fig. 2 is alongitudinal elevation of Fig. l. Fig. 3 is an end elevation ofthemachine. In these three figures the lampchimneys are indicated by thickdotted lines in order to avoid complicating the drawings. Fig.4illustrates in side and end view one of the blow-pipes which I use forheating the parts of the chimneys to be cut. Fig. 5 showsin detail thepart of the apparatus which supports one of the ends of the chimney.Fig. 6 represents an arrangement for moving the cutters orcutting-points longitudinally other than that shown in Figs. 1, 2, and3. Fig. 7 represents the arrangement of the support for adj usting thecutters, the left-hand figure being a section through the axis of theligure on the right-hand side. Figs. 8 and E) show an a1'- rangement forcutting four chimneys at the same time.

In all the ligures similar letters designate corresponding parts.

The frame-work ot` the machine is made of four iron plates A B and A B',firmly connected with each other by two rods O, which pass through lugsa, provided on the under sides of the said plates, Fig. 3. Upon each otthese plates are secured the brackets G, which support the shafts II andJ.

Between the iron plates A and B on one hand and the plates A. and B onthe other hand are provided the intermediate plates D E F and D E F. Theplates D E and D E are only moved in exceptional cases and certainbulges of the chimneys.

All the plates are provided with lugs, through which the shafts C pass;but the plates F and F are further provided with a screw-threaded lug f,Fig. 3, traversed by the screw I, .so as to enable these plates to bemoved in one or the other direction in the axis of the machine,according to the length of the chimneys to be eut. This screw, whichalso extends through a lug which has no screw-thread and which isprovided on the under side of the plate B', is actuated by thehand-wheel 2'..

Each of the plates F F supports a blowpipe K, the use of which is forhea-ting the parts of the chimney to be operated upon by cuttingdevices. The heating ofthe chimney should occur just before applying thecutters to the chimneys, as this prevents them from cracking and alsogives the glass a much smoother surface after the cutting operation thancould be produced by cutting the glass in its cold state. Thus it may betermed tire-polishing. These blow-pipes can be displaced in the verticaldirection by means of two nuts 7e, placed upon their admissiom pipe 7c',Fig. Ll. These pipes are divided into two parts by a small partition,(shown in dotted lines,) one part serving for the passage of gas and theother for the passage of air.

The lower part of the pipe k is divided into two branches provided withtwo cocks k2, to which is attached an india-rubber pipe, Fig. 3, servingfor feeding the blow-pipe. The gas IOC and air must not meet until theyarrive in the cylindrical case 7c3, whence they1 pass through the nozzle7c, which must not have au orifice of more than half a millimeter inwidth by four centimeters in length.

Upon each blow-pipe K, Figs. l, 2, and 5, and below the cylindrical case7a3, is fixed a small iron plate m, provided with a groove or slot m',Fig. l, for enabling the bracket M to be at will caused to move towardor away from the blow-pipe, the said bracket, which is also providedwith a groove or slot, permitting two other small brackets m5 to recedefrom or approach each other through the medium of the spindle 'm6,having a left-handed thread on one of its halves and alight-handedthread on the other half. This spindle m6 is actuated by the milledwheel m4, placed at its middle part. The two small brackets m5 carryaxes m2, turning upon fine points and designed to support small rollersm3, which mustturn very freely, and the object. of which is to supportone of the extremities of the chimney to be cut. These small rollers m3are surrounded with india-rubber rings.

The whole bracket above described, which is placed upon the plate m,enables large and small chimneys to be optionally placed at the desireddistance from the nozzle of the blowpipe.

Upon the plates D D are placed blow-pipes K', which do not differ fromthose arranged upon the plates F and F, excepting that they are notprovided with plates maud their brackets'M. Upon the plates D F and D Fare likewise provided brackets P, rounded off at their upper portion forenabling the parts p', which tit with their base upon the upper tenon p7of the bracket P, to be inclined to the right or left hand side, so asto always obtain the exact direction of the cutter or cutting-point p3.The cutters or cutting-points p3 are supported laterally in guidesp2 ofthe partp. A

small sliding piece p4 is fixed by means of a screw p5 upon the cutterp3, Fig. 3. Thescrew p5 serves to fix the sliding piecep4 at preciselythe same point as the cutter, in order to have the exact length of thepart of this cutter which is necessary for cutting the chimney inaccordance with its size. The small sliding pieces p4, which impartmotion to the cutters, are actuated by eccentrics placed upon the shaftJ, one on the right-hand side of the machine and the other on theleft-hand side, so that the cutters will be moved intermittently. Eachof these eccentrics is provided on the shaft J, upon which are placedthree disksj, which take up the rodsjl and keep them in their place.

The height of a pair of cuttersp3 is adj usted with absolute exactitudeby the action of the screw p8, placed in the interior of the bracket P,which possesses an opening p9 for the passage of the milled wheel p10,by which the screw p8 is actuated. The small tenons p have for theirobject to maintain the tenon p7 vertical for the purpose of preventingit the cutters abruptly to the front for cutting the chimneys at thedesired point.

For the proper operation of the apparatus care must be exercised thatthe point of the cutter, when stationary-that is to say, while theeccentric makes its half-revolution-shall be at a distance of about onecentimeter from the chimney to be cut. Accordingly, the operations abovedescribed are effected asfol lows: The shaft J, receiving its movementfrom the pulley L, aetuates the eccentrics and the latter in their turnencounter the small sliding pieces p4. The shock caused by one of therods or transverse pieces J of the eccentrics, which are connected witheach other by the parts J, striking against the sliding pieces p4 throwsthe cutters forward for cutting the chimney, and the helical springs p6,as soon as the rods of the eccentrics are passed, move the cutters tothe rear again. For equalizing the work the eccentrics are placed so asnot to actuate the two cutters on the righthand side and the two cutterson the lefthand side at the same time.

The rollers n, which receive their movement in the manner hereinafterdescribed, actuate small shafts n', supported at the other extremity bythe brackets N. These rollers n can be fixed at a given place throughthe medium of a pressing-screw, so as to adapt them to the chimneys tobe cut, and they are designed to impart a rotary movement to thechimneys. They are surrounded by indiarubber rings. To the chimneyplaced upon these rollers is imparted a more or less rapid rotarymovement, according to the velocity given to the apparatus, and itcauses the above-named small rollers m3, provided upon the brackets, toturn by themselves. The brackets M, which carry the rollers m3, beingmounted so as to enable the chimney to be inclined in one or the otherdirection, the chimney can be moved to the front or to the rear and willbear with its lower part against the screw g', which alsov serves forregulating the length of the part to be cut off. These screws g aresupported by parts g, which are forked and held in their place throughthe medium of screws on the brackets g, arranged upon the plates A A'.

The brackets N and N carrying the small shafts n', have their lowerparts provided with teeth, so as to form racks, these parts being guidedin small cases n2, having openings which leave a portion of the toothedpart uncovered. These cases Ware iixed below the plates A E and A E. Thebrackets N N are designed to be displaced in a vertical di- IIO rection,in accordance with the thickness ef the chimneys to be cut, because asthe cutters or cutting-points cannot be displaced in the verticaldirection relatively to the eccentrics they would be too low for thethick chimneys and too high for the thin chimneys.

The brackets N and N are actuated by the shaft O, through the medium ofthe wheel 0, upon which bears a pawl o', placed upon one ot the rods Cand which serves to maintain the rollers at a suitable height. Thisshaft() is held in its place by lugs provided on the under side of theplates A E B and A E B. In these lugs are fixed upon the shaft O andopposite the toothed part of the brackets N and N the two toothedsectors o2, Fig. 3. By the act-ion of the wheel o movement is thusimparted to the sectors 02, which actuate in their turn the partsforming racks of the brackets N N, which enables the latter to be raisedor lowered, according to requirements.

Fig. l5 shows another arrangement for moving the cutters. Instead ofemploying helical springs p5, Fig. 3, for moving the cutters to the rearagain after they have been thrown forward by the action of therod of theeccentric upon the above-named sliding piece, I make use of a fiat steelspring p12, of the form shown in the drawings, which is held in itsposition at its upper part by a screw extending through the bow-shapedpieces p13, fixed upon the guides p2. The lower parts of the spring psurround the sliding piece p4, which they accompany when it makes itsforward movement and which they move to the rear, together with thecutter or cutting-point p3, as soon as the rod] of the eccentric ispassed, Fig. G.

The machine is operated in the following manner: Movement is imparted byany motive power through the medium of the pulley 71., placed upon theshaft Il. This pulley is made of two parts, one receiving the belt whilethe other receives a small cord or band for transmitting the movement tothe doublegrooved pulley h3, which in its turn transmits it to thepulley h4, these last mentioned two pulleys actuating the small shaftsn, which support one of the extremities of the chimney and move thelatter round in a rotary movement, which it communicates to smallrollers m3, that support it at the other extremity. The above describedmovement takes place at the right-hand side of the machine. The samemovement is effected at the left-hand side, this movement being obtainedfrom the grooved pulley h2, placed at the eX- Ytremity on thedriving-shaft H.

I have found from practice that the best results are obtained by drivingthe shafts n' five revolutions to one of shaft H, although thisrequirement is not absolute. One of the stepped pulleys 7L', fixed uponthe shaft II, transmits the movement of the latter by a belt to theshaft L, carrying the eccentrics, through the medium of the pulley L. Byreason of this arrangement of the pulleys 7L and L the shaft J can bedriven at different velocities. This device for changing the velocitycan be replaced by gear-wheels arranged upon the right-hand extremitiesof the shafts H and J.

It may be mentioned that with my improved machine at least six thousandchimneys can be cut per day, the output varying, of course, according tothe size of the chimneys. Moreover, my apparatus cuts chimneys level andsmooth, so as to dispense with the grinding operation.

Figs. S and 9 show the arrangement which I use for doubling the outputof my machine, which in this case is arranged for cutting four chimneysat the same time. In its details this arrangement is similar to thatwhich serves for cutting two chimneys. In fact, it comprises twoapparatuses of the kind above described, which are placed side by sideand are both operated by a single transmittinggear provided in themiddle. This arrangement is clearly shown in Figs. S and 9, whichrepresent an upper view and a side view of the machine.

It will be understood that I do not limit myself to the specialarrangements hereinbefore set forth, as various modifications in thedetails of my apparatus can be made without departing from the principleof my invention.

What I do claim as my invention, and desire to secure by Letters Patent,is

l. In a machine for cutting lamp-chimneys, the brackets P, secured tothe frameof the machine for supporting the cutters p3, and eccentricsplaced on the shaft J for actuating said cutters, substantially as shownand described.

2. In a machine for cutting lamp-chimneys, the combination of thetoothed sectors o2, placed upon the shaft O, which is actuated by thewheel o, held in its place by the pawl 0', with the lower grooved partsof the brackets N and N for raising or lowering the latter,substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

JEAN LOBET. Witnesses:

GERARD JOSEPH COTTYING, ZOLLONDEN.

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